neural and hormonal explanation- a01

Question 1

Role of the hypothalamus

Answer 1

Integrates nervous and endocrine systems, maintains the homeostasis of blood glucose levels.

Question 2

what is the lateral hypothalamus (LH)

Answer 2

Feeding center (‘on switch’) activated when glucose levels fall below threshold, triggering hunger and eating behaviors.

Question 3

what is the ventro-medial hypothalamus (VMH)

Answer 3

Satiety centre (‘off switch’), activated when glucose levels rise above threshold, making individual feel full and stop eating.

Question 4

what is the role of ghrelin

Answer 4

Appetite stimulant – more ghrelin is released by the stomach the longer we go without food.

Question 5

what is the role of leptin

Answer 5

Appetite suppressant produced by fat cells – when levels rise above threshold VMH responds.

Question 6

what is our main source of energy

Answer 6

glucose (sugar)

Question 7

what is homeostasis

Answer 7

organism maintaining a steady environment